User Panel
User Panel
User Panel
|
Posted: 2/5/2011 1:31:10 PM EDT
[#1]
I use zero
|
|
|
|
Posted: 2/5/2011 1:37:34 PM EDT
[#2]
Just a little kiss, if any.
|
|
|
|
Posted: 2/5/2011 1:39:23 PM EDT
[#3]
Barely any.
|
|
|
|
Posted: 2/5/2011 2:22:59 PM EDT
[#4]
Very light.
|
|
|
|
Posted: 2/5/2011 2:35:09 PM EDT
[#5]
If you're attempting to achieve anything other that dimensional uniformity you're wasting your time!
|
|
|
|
Posted: 2/5/2011 4:09:59 PM EDT
[#6]
Look at the FCD in the press without a round in the shell holder. Take note of the spacing between the metal leafs. Put a round in the shell holder and run the round up until the leaf gap is reduced by half.
|
|
|
|
Posted: 2/5/2011 4:13:23 PM EDT
[#7]
Would some of you be so kind so post a pic or two for us newbs to show us what a proper crip looks like?
|
|
|
|
Posted: 2/5/2011 5:33:05 PM EDT
[#8]
Quoted:
Look at the FCD in the press without a round in the shell holder. Take note of the spacing between the metal leafs. Put a round in the shell holder and run the round up until the leaf gap is reduced by half. Pics? |
|
|
|
Posted: 2/5/2011 6:37:15 PM EDT
[#9]
Here are some pics of a batch of 30-30 I did a while ago. From this Thread. Bet you didn't search 30-30.
223 FCD works the same way. 
FCD at rest. Collet gap is open fully. 
FCD is crimping here. Collet gap is half closed. You never want the gap to close fully. Easy to overcrimp if you aren't careful. 
The "what it should look like" pic. Crimped round on top, not crimped on bottom. In 223, many folks don't crimp any of their loads. Proper neck tension is all that is needed. My method is to crimp my 55 and 62 gr FMJBT loads with a FCD. All other loads and especially precession loads get no crimp. Try both ways, then do what works best for you. |
|
|
|
Posted: 2/6/2011 4:51:54 PM EDT
[#10]
Thanks for the pics. The are very helpful. I now know what to look for in a proper crimp.
|
|
|
|
Posted: 2/7/2011 4:02:56 AM EDT
[#11]
none
|
|
|
|
Posted: 2/7/2011 5:00:19 AM EDT
[#12]
The most accurate way to judge is to use a pair of dial calipers. Most that crimp use a very light crimp that change the total diameter by only 2-3 thousands. Best way is to measure first before you start, turn the crimp in very slowly and crimp, repeat until you get the above reduction in diameter.
|
|
|
|
Posted: 2/7/2011 5:04:38 AM EDT
[#13]
What happens if you over do it?
You make a cannulure on a bullet that didn't have one Brett |
|
|
|
Posted: 2/7/2011 8:40:42 AM EDT
[#14]
Quoted:
What happens if you over do it? You make a cannulure on a bullet that didn't have one Brett Not exactly true. The FCD for rifle Crimps in the same axis as the bullet. |
|
|
|
Posted: 2/7/2011 9:04:39 AM EDT
[#15]
Quoted:
Quoted:
What happens if you over do it? You make a cannulure on a bullet that didn't have one Brett Not exactly true. The FCD for rifle Crimps in the same axis as the bullet. Over crimping with do a number of things. One is it will deform your bullet which may affect flight characteristics. Not so important for a close range pistol round but I would think more important for match rounds. The other thing it will do is to increase chamber pressure as the brass will hold on to the bullet more. How much depends on the degree of crimp and usually is anybody's guess. |
|
|
|
Posted: 2/7/2011 9:06:46 AM EDT
[#16]
Quoted:
Quoted:
What happens if you over do it? You make a cannulure on a bullet that didn't have one Brett Not exactly true. The FCD for rifle Crimps in the same axis as the bullet. I meant to put get a question mark up there, I didn't mean to make it come acrossed as a statement. If your brass is too short, it will push in similar to making its own cannalure. Normally, the contact area is too big for it to do that, but if your brass is too short, it is different. Brett |
|
|
|
Posted: 2/7/2011 9:58:12 AM EDT
[#17]
I shoot a lot of reloaded .223 in NRA High Power/Service Rifle, and in practice each weekend in between matches.
I use my Lee FCD to fill an empty slot in a die box. Proper neck tension is all you need, even in rapid fire. But everybody's needs are different. If I were reloading ammo for the day when aliens invade, which will be further complicated by millions of zombies rising from the grave, I would crimp everything and use primer sealer on primer pockets and inside the necks. Maybe that's what I'm saving the Lee FCD for. 
|
|
|
|
Posted: 2/7/2011 10:15:54 AM EDT
[#18]
@DryFlash,
How much would you recommend crimping for a bullet without cannelure? |
|
|
|
Posted: 2/7/2011 10:39:05 AM EDT
[#19]
Quoted:
The most accurate way to judge is to use a pair of dial calipers. Most that crimp use a very light crimp that change the total diameter by only 2-3 thousands. Best way is to measure first before you start, turn the crimp in very slowly and crimp, repeat until you get the above reduction in diameter. What should the diameter be prior to seating the bullet? And what's good for after a crimp? |
|
|
|
Posted: 2/7/2011 2:34:40 PM EDT
[#20]
I made some measurement of this before but don't have those numbers anymore, but since the bullet is 224" in diameter, it will be slightly wider due to the contribution by the casing's neck.
For the purpose of this discussion anyway, what is important is that you make a mark on the tip of the neck area that you will make the initial measurements (just in case of uneven case neck thickness) and measure that spot 3-4 times to make sure that you can get a reliable and reproducible diameter. From there on, you slowly turn down the die and start crimping until you start to get a mark on the neck and a reduction in neck diameter. You should be able to both feel when the die starts to crimp and a mark will show up on the neck (see fain band in the 30-30 rounds in the photo dryflash3 posted). A decrease in 2-3 thousands does not take a lot of dialing on the die so go slow. |
|
|
Win a FREE Membership!
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.
AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm.
Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more.
Copyright © 1996-2024 AR15.COM LLC. All Rights Reserved.
Any use of this content without express written consent is prohibited.
AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.
